System of armature-winding for electric motors.



No. 699,764. Patented May |'3, I902.

T. .1. MURPHY. SYSTEM-0F ABMATURE WINDING FOR ELECTRIC MOTORS.

Application filed Opt. 17, 1901.)

(No Model.)

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UNITED STATES PATENT OFFICE.

THOMAS J. MURPHY, OF MONTREAL, CANADA.

SYSTEM OF ARMATURE-WINDING FOR ELECTRIC MOTORS.

SPECIFICATION forming part of Letters Patent No. 699,764, dated May 13, 1902. Application filed October 17,1901. Serial no. 79,038. (No model.)

To all whom itmay concern.-

Be it known that I, THOMAS J. MURPHY, a subject of the King of Great Britain, residing at Montreal, in the county of Hochelaga,

Province of Quebec, Canada, have invented new and useful Improvements in Formed.

Wound Coils for Armatures of Electric Motors and the Like, of which the following is a specification.

My invention relates to improvements in formed or machine-wound coils wherein the outer span or reach of the coil is two or more times longer than the inner span, necessitating the former being laid in two or more layers in the process of winding, resulting in an easily-wound armature, easily repaired and economical of space. I attain these objects by the mechanism illustrated in the accompanying drawing, in which the figure is a side elevation of the coils.

Similar letters refer to similar parts throu ghout the drawing.

The coils A B are adapted to a four-polemotor machine, and therefore span a quarter of the circumference of the armature. The portions A B are placed in slots in the core of the armature in the usual way. The inner reaches H and H" are preferably in the same plane respectively, and their length is about half of the outer reaches, which alternately lie outside one another on opposite sides, as shown in the figure, between C E and D F on one side and G E and D F on the other.

What I claim as my invention, and desire to secure by Letters Patent, is

In a system of armature-winding the com bination of coils A B of the portion D" F" coil 13 being arranged to lie outside of coil A between 0 E and portion between G E coil A to lie outside D F as shown and described.

THOMAS J. MURPHY.

Witnesses:

B. J. BARRETT, M. MURPHY. 

